Hi, The solution can be easily found on Internet.
By the way, the following does what you are looking for: > f[f<0] Regards, Pascal On 05/08/2013 10:54 AM, jpm miao wrote:
Hi, I have a vector f with some negative columns. I remember that there is an easy expression that can find out negative items. Can someone tell me how I can do it? It seems to be f[i such that f[i]<0 ...] Thanks, Miaod<-1:7 f<-(-2)^d f[1] -2 4 -8 16 -32 64 -128 [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
